Question 902491
add them up and divide by 3
(x+x+8+88)=2x+96
(2x+96)/3=89
2x+96=267
2x=171
x=85.5
(2x+96)/3=80
2x+96=240
2x=144
x=72
x is between 72 and 85.5
x+8 is between 80 and 93.5
(72+80+88)/3=240/3=80
(85.5+93.5+88)/3=267/3=89